If you're looking for an answer to "How can I be happy?" then the response from the experts is, "You're asking the wrong question." The better question is why our idea of happiness is so screwed up that most of us wouldn't recognize the real thing if we saw it. Well ...
5What We're Calling Happiness is a Recent Invention
This should blow your mind: The entire concept that you can become happy via some action you can take is a relatively recent invention. And the concept that a person should be happy, and that anything else is the result of some unusual breakdown in the system, is extremely recent.
"I'd define happiness as less than four types of lice on my body."
Now, before everyone digs out their old goth clothes and screams, "Aha! We told you that the world was just an endless black ocean of suffering!" that's actually the opposite of the point we're making. It appears that the reason so many people profess to be miserable is specifically because they think they're missing out on some magical emotion that "happy" people feel all the time. They're tormenting themselves over the loss of something that nobody actually has, because that thing doesn't even have a definition.
See, the thing is that humans have never actually settled on what "happiness" is. A historian named Darrin McMahon exhaustively studied how happiness has been viewed over the last few thousand years and found that it was constantly changing.
"I'd say I define happiness as less than three types of lice on my body."
Go back to ancient Greece and it's very simple: Happiness = Luck. Either the gods dribbled their joy juice on you or didn't; either way, there was nothing you could do about it. And that was it, end of conversation. It was nothing to get upset about. In fact, in every European language, the root of the word for happiness is some older word that meant "luck." Ours comes from the old Norse and Old English word "hap", and hap simply means "luck."
Flash forward to Aristotle's day, 335-ish B.C. Philosophers of the time considered happiness to be synonymous with virtue. In other words, do good to feel good. If you didn't feel good, it meant you weren't being virtuous enough. Now, we don't want to come off as cynical here, but it almost sounds like this was when they started using this elusive idea of happiness as a motivational tool. Happiness is the carrot on the stick that makes you do all of the things that keep society running smoothly.
"All of this will be worth it, once I'm able afford that crack habit I've been longing for."
After that, you get into medieval times when early Christians saw happiness as something a soul was to be rewarded with in heaven, and not something attainable in the mortal world. Then the Renaissance came along and brought us the concept of pleasure equaling happiness. Keep in mind, those two ideas weren't always connected -- the old-school thinkers described happiness as the overall state of somebody who had lived their life well, completely separating it from that feeling you get when you eat a warm cookie or play with a puppy.
"I'm deeply, spiritually satisfied about the number of puppies I've played with."
But the new definition of happiness seemed to be "you feel like you're playing with a puppy, all the time." Then the Enlightenment declared that everyone had a right to be happy, and by the time the American Declaration of Independence was written in 1776, the "pursuit of happiness" was declared an inalienable right, endowed by the creator. That's a damned 180-degree turn from what the ancient Greeks thought. And if we're defining happiness as 24/7 puppy time, then it doesn't work.
"... with liberty and puppies for all."
Not according to science, anyway. Because ...